.. code-block:: python
        # select the github engine and pass the search suffix
        s = SearchWrapper("langchain library", query_suffix="!gh")
        s = SearchWrapper("langchain library")
        # select github the conventional google search syntax
        s.run("large language models", query_suffix="site:github.com")
*NOTE*: A search suffix can be defined on both the instance and the method level.
The resulting query will be the concatenation of the two with the former taking
precedence.
See `SearxNG Configured Engines
<https://docs.searxng.org/admin/engines/configured_engines.html>`_ and
`SearxNG Search Syntax <https://docs.searxng.org/user/index.html#id1>`_
for more details.
Notes
-----
This wrapper is based on the SearxNG fork https://github.com/searxng/searxng which is
better maintained than the original Searx project and offers more features.
Public searxNG instances often use a rate limiter for API usage, so you might want to
use a self hosted instance and disable the rate limiter.
If you are self-hosting an instance you can customize the rate limiter for your
own network as described `here <https://github.com/searxng/searxng/pull/2129>`_.
For a list of public SearxNG instances see https://searx.space/
"""
import json
from typing import Any, Dict, List, Optional
import requests
from pydantic import BaseModel, Extra, Field, PrivateAttr, root_validator, validator
from langchain.utils import get_from_dict_or_env
def _get_default_params() -> dict:
    return {"language": "en", "format": "json"}